TPS7A47

ACTIVE

1-A, 36-V, low-noise, high-PSRR, low-dropout voltage regulator with enable

Product details

Output options Adjustable Output, Fixed Output Iout (max) (A) 1 Vin (max) (V) 36 Vin (min) (V) 3 Vout (max) (V) 34 Vout (min) (V) 1.4 Rating Catalog Noise (µVrms) 4 PSRR at 100 KHz (dB) 60 Iq (typ) (mA) 0.58 Thermal resistance θJA (°C/W) 30.5 Load capacitance (min) (µF) 10 Regulated outputs (#) 1 Features Enable, Soft start Accuracy (%) 2.5 Dropout voltage (Vdo) (typ) (mV) 307 Operating temperature range (°C) -40 to 125
Output options Adjustable Output, Fixed Output Iout (max) (A) 1 Vin (max) (V) 36 Vin (min) (V) 3 Vout (max) (V) 34 Vout (min) (V) 1.4 Rating Catalog Noise (µVrms) 4 PSRR at 100 KHz (dB) 60 Iq (typ) (mA) 0.58 Thermal resistance θJA (°C/W) 30.5 Load capacitance (min) (µF) 10 Regulated outputs (#) 1 Features Enable, Soft start Accuracy (%) 2.5 Dropout voltage (Vdo) (typ) (mV) 307 Operating temperature range (°C) -40 to 125
VQFN (RGW) 20 25 mm² 5 x 5
  • Input Voltage Range: +3 V to +36 V
  • Output Voltage Noise:
    4 µVRMS (10 Hz, 100 kHz)
  • Power-Supply Ripple Rejection:
    • 82 dB (100 Hz)
    • > 55 dB (10 Hz, 10 MHz)
  • Two Output Voltage Modes:
    • ANY-OUT™ Version (User-Programmable
      Output via PCB Layout):
      • No External Feedback Resistors or
        Feed-Forward Capacitors Required
      • Output Voltage Range: +1.4 V to +20.5 V
    • Adjustable Version (TPS7A4701 only):
      • Output Voltage Range: +1.4 V to +34 V
  • Output Current: 1 A
  • Dropout Voltage: 307 mV at 1 A
  • CMOS Logic Level-Compatible Enable Pin
  • Built-In Fixed Current Limit and
    Thermal Shutdown
  • Available in High-Performance Thermal Package:
    5-mm × 5-mm QFN
  • Operating Temperature Range:
    –40°C to 125°C
  • Input Voltage Range: +3 V to +36 V
  • Output Voltage Noise:
    4 µVRMS (10 Hz, 100 kHz)
  • Power-Supply Ripple Rejection:
    • 82 dB (100 Hz)
    • > 55 dB (10 Hz, 10 MHz)
  • Two Output Voltage Modes:
    • ANY-OUT™ Version (User-Programmable
      Output via PCB Layout):
      • No External Feedback Resistors or
        Feed-Forward Capacitors Required
      • Output Voltage Range: +1.4 V to +20.5 V
    • Adjustable Version (TPS7A4701 only):
      • Output Voltage Range: +1.4 V to +34 V
  • Output Current: 1 A
  • Dropout Voltage: 307 mV at 1 A
  • CMOS Logic Level-Compatible Enable Pin
  • Built-In Fixed Current Limit and
    Thermal Shutdown
  • Available in High-Performance Thermal Package:
    5-mm × 5-mm QFN
  • Operating Temperature Range:
    –40°C to 125°C

The TPS7A47 is a family of positive voltage (+36 V), ultralow-noise (4 µVRMS) low-dropout linear regulators (LDO) capable of sourcing a 1-A load.

The TPS7A4700 output voltages are user-programmable (up to 20.5 V) using a printed circuit board (PCB) layout without the need of external resistors or feed-forward capacitors, thus reducing overall component count.

The TPS7A4701 output voltage can be configured with a user-programmable PCB layout (up to 20.5 V), or adjustable (up to 34 V) with external feedback resistors.

The TPS7A47 is designed with bipolar technology primarily for high-accuracy, high-precision instrumentation applications where clean voltage rails are critical to maximize system performance. This feature makes the device ideal for powering operational amplifiers, analog-to-digital converters (ADCs), digital-to-analog converters (DACs), and other high-performance analog circuitry in critical applications such as medical, radio frequency (RF), and test-and-measurement.

In addition, the TPS7A47 is ideal for post dc-dc converter regulation. By filtering out the output voltage ripple inherent to dc-dc switching conversions, maximum system performance is ensured in sensitive instrumentation, test-and-measurement, audio, and RF applications.

For applications where positive and negative low-noise rails are required, consider TI’s TPS7A33 family of negative high-voltage, ultralow-noise linear regulators.

The TPS7A47 is a family of positive voltage (+36 V), ultralow-noise (4 µVRMS) low-dropout linear regulators (LDO) capable of sourcing a 1-A load.

The TPS7A4700 output voltages are user-programmable (up to 20.5 V) using a printed circuit board (PCB) layout without the need of external resistors or feed-forward capacitors, thus reducing overall component count.

The TPS7A4701 output voltage can be configured with a user-programmable PCB layout (up to 20.5 V), or adjustable (up to 34 V) with external feedback resistors.

The TPS7A47 is designed with bipolar technology primarily for high-accuracy, high-precision instrumentation applications where clean voltage rails are critical to maximize system performance. This feature makes the device ideal for powering operational amplifiers, analog-to-digital converters (ADCs), digital-to-analog converters (DACs), and other high-performance analog circuitry in critical applications such as medical, radio frequency (RF), and test-and-measurement.

In addition, the TPS7A47 is ideal for post dc-dc converter regulation. By filtering out the output voltage ripple inherent to dc-dc switching conversions, maximum system performance is ensured in sensitive instrumentation, test-and-measurement, audio, and RF applications.

For applications where positive and negative low-noise rails are required, consider TI’s TPS7A33 family of negative high-voltage, ultralow-noise linear regulators.

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Technical documentation

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Type Title Date
* Data sheet TPS7A470x 36-V, 1-A, 4-µVRMS, RF LDO Voltage Regulator datasheet (Rev. F) PDF | HTML 01 Oct 2014
White paper Parallel LDO Architecture Design Using Ballast Resistors PDF | HTML 14 Dec 2022
White paper Comprehensive Analysis and Universal Equations for Parallel LDO's Using Ballast PDF | HTML 13 Dec 2022
Application note LDO Noise Demystified (Rev. B) PDF | HTML 18 Aug 2020
Technical article Choosing buck converters and LDOs for miniature industrial automation equipment PDF | HTML 29 Jan 2020
Application note A Topical Index of TI LDO Application Notes (Rev. F) 27 Jun 2019
Technical article Designing a pre-tracking regulator, part 1: for a positive-output LDO PDF | HTML 18 Feb 2019
Selection guide Power Management Guide 2018 (Rev. R) 25 Jun 2018
Selection guide Low Dropout Regulators Quick Reference Guide (Rev. P) 21 Mar 2018
Technical article Designing a power supply solution for pipeline ADCs – Part 1 PDF | HTML 03 Sep 2015
Technical article How to filter out noise in your DC/DC design PDF | HTML 18 Aug 2015
White paper How to measure LDO noise 24 Jul 2015
User guide TPS7A47xxEVM-094 Evaluation Module (Rev. A) 02 Aug 2013
Analog Design Journal 1Q 2013Issue Analog Applications Journal 22 Jan 2013
Analog Design Journal How to pick a linear regulator for noise-sensitive applications 22 Jan 2013
Application note ANY-OUT™ LDO Controlled by I2C™ IO Expander Device (Rev. A) 20 Sep 2012

Design & development

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Simulation model

TPS7A4700 PSpice Transient Model (Rev. A)

SBVM190A.ZIP (40 KB) - PSpice Model
Simulation model

TPS7A4700 TINA-TI Transient Reference Design

SBVM302.TSC (776 KB) - TINA-TI Reference Design
Simulation model

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SBVM303.ZIP (10 KB) - TINA-TI Spice Model
Simulation model

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Simulation model

TPS7A4701 Unencrypted PSpice Transient Model (Rev. A)

SBVM621A.ZIP (2 KB) - PSpice Model
Calculation tool

PARALLEL-LDO-CALC Parallel low-dropout (LDO) calculator

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Supported products & hardware

Supported products & hardware

Products
Linear & low-dropout (LDO) regulators
TPS7A33 1-A, high-PSRR, negative, adjustable low-dropout voltage regulator with enable TPS7A47 1-A, 36-V, low-noise, high-PSRR, low-dropout voltage regulator with enable TPS7A47-Q1 Automotive 1-A, 36-V, low-noise, high-PSRR, low-dropout voltage regulator with enable TPS7A4701-EP Enhanced product, 36-V, 1-A, 4-μVRMS, RF LDO voltage regular TPS7A52 2-A, low-VIN (1.1-V), low-noise, high-accuracy, ultra-low-dropout (LDO) voltage regulator TPS7A52-Q1 Automotive 2-A, low-VIN (1.1-V), low-noise, high-accuracy, ultra-low-dropout (LDO) voltage regulator TPS7A53 3-A, low-VIN (1.1 V) low-noise high-accuracy ultra-low-dropout (LDO) voltage regulator TPS7A53-Q1 Automotive, 3-A, low-VIN (1.1 V) low-noise high-accuracy ultra-low-dropout (LDO) voltage regulator TPS7A53A-Q1 Automotive, 3-A, low-VIN 5.6-µVRMS low-noise high-accuracy ultra-low dropout voltage regulator TPS7A53B 3-A, 1.1-V, low-VIN, low-noise high-accuracy ultra-low-dropout voltage regulator with 0.5-V low VREF TPS7A54 4-A, low-VIN (1.1-V), low-noise, high-accuracy, ultra-low-dropout (LDO) voltage regulator TPS7A54-Q1 Automotive 4-A, low-VIN (1.1-V), low-noise, high-accuracy, ultra-low-dropout (LDO) voltage regulator TPS7A57 5-A, low-input-voltage, low-noise, high-accuracy low-dropout (LDO) voltage regulator TPS7A83A 2-A, low-VIN (1.1-V), low-noise, high-accuracy, ultra-low-dropout voltage regulator with power good TPS7A84A 3-A, low-VIN (1.1-V), low-noise, high-accuracy, ultra-low-dropout voltage regulator with power good TPS7A85A 4-A, low-VIN (1.1-V), low-noise, high-accuracy, ultra-low-dropout voltage regulator with power good TPS7A94 1-A, ultra-low noise, ultra-high PSRR, RF voltage regulator TPS7B7702-Q1 Automotive 300-mA, off-battery (40-V), dual-channel adjustable antenna low-dropout voltage regulator TPS7A8300 2-A, low-VIN, low-2-A, low-VIN, low-noise, ultra-low-dropout voltage regulator with power good wi TPS7A84 3-A, low-VIN, low-noise, ultra-low-dropout voltage regulator with power good with high-accuracy TPS7A85 4-A, low-VIN, low-noise, ultra-low-dropout voltage regulator with power good with high-accuracy TPS7A96 2-A, ultra-low noise ultra-high PSRR RF voltage regulator TPS7A4501-SP Radiation-hardened, QMLV, 1.5-V to 20-V input 1.5-A low-dropout (LDO) regulator TPS7H1111-SP Radiation-hardened, QMLV and QMLP, 1.5A ultra-low-noise high-PSRR low-dropout (LDO) regulator TPS7H1111-SEP Radiation-tolerant, 1.5A, ultra-low-noise ultra-high-PSRR RF LDO regulator
Hardware development
Evaluation board
TPS7A57EVM-081 TPS7A57 evaluation module for 5-A low-noise high-accuracy low-dropout (LDO) voltage regulator

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